Exercise mat



FIG. 1 is a perspective view of an exercise mat showing my new design;

FIG. 2 is a left end elevational view thereof;

FIG. 3 is a side elevational view of the side opposite that shown inFIG. 1;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is another perspective view of the design shown in FIGS. 1through 4 in a rolled-up condition.

The ornamental design for an exercise mat, as shown and described.